Google plans to add more APIs and client libraries to that list. The feature is implemented as an OAuth 2.0 flow and is compliant with draft 25 of the OAuth 2.0 specification, according to Smith.

IDC analyst Stephen Hendrick said that security remains the main concern among users regarding cloud services, so Google has done well to focus on this initiative.

"Since the cloud is predicated on service enablement, security improvements specific to service invocation are likely to gain attention and garner praise. Initiatives like OAuth 2.0 and Google's decision to align their Service Account support with OAuth is an important step forward in improving cloud security," Hendrick said via email.